I failed emission test with code P0420 PO300.

Tiny
ANONYMOUS
  • MEMBER
  • 2009 CHEVROLET MALIBU
  • 10,017 MILES
I failed emission test with code p0420 po300 andd
P0101 isit the catalytic converter or oxgen sensor? How much will I have to pay to get it repaired at a muffler shop. Oh no misfire
Thursday, April 11th, 2013 AT 1:07 AM

2 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
You need a cat. Get a good quality cat not a cheap one. After it is repaired, it needs to be driven to see if the missfire goes away. The 101 is a mass air flow code but doesn not mean it needs to be replaced. Have it checked first

Roy
Was this
answer
helpful?
Yes
No
Thursday, April 11th, 2013 AT 1:19 AM
Tiny
RUSLADLC
  • MEMBER
  • 1 POST
Which cat would this be referring to? There's one connected to the exhaust manifold itself on the 2.4l and then there is either another one before the muffler or a resonator. Only saw sensors near the first one.
Was this
answer
helpful?
Yes
No
Wednesday, August 28th, 2013 AT 4:10 PM

Please login or register to post a reply.

Related Catalytic Converter Test Content

Catalytic Converter Test
GUIDE
Catalytic Converter Test
1. Check Engine Light: The most popular, and easiest way to tell if the catalytic converter is bad is a check engine light warning with the trouble codes P0420 or P0430....
VIEW MORE